Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4840e64cbe988d…

MALICIOUS

PDF

73.8 KB Created: 2022-04-04 17:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-04
MD5: f3ca3b4c4ee5ff63bd90a917482dd5c3 SHA-1: fe5994f862f447a9facc249503616fe5daff629b SHA-256: de4840e64cbe988dcab50e57803222fbbf1b5ef2680cdbb8ebca707bdc465d76
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yubit.co.za/YmrXLWy8?keyword=hotpoint%20gas%20oven%20igniter%20replacement PDF link annotation
    • https://fosisejabevenot.weebly.com/uploads/1/3/5/3/135398983/zozasofutu.pdfIn PDF document text
    • https://sajozigita.weebly.com/uploads/1/3/0/8/130814351/fulovaginedutu_xirolotifapud.pdfIn PDF document text
    • https://loxajutuwaguxi.weebly.com/uploads/1/3/2/6/132681393/14d4f08.pdfIn PDF document text
    • https://guwidavimup.weebly.com/uploads/1/3/4/8/134893931/9172437.pdfIn PDF document text
    • https://tupumerar.weebly.com/uploads/1/3/2/6/132695397/fokulubuxedo.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16231cfb91820a---mewegufujovamosose.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/10751832232.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/pofunopisu-lixomurarabiba-kokafapid.pdfIn PDF document text
    • https://vunorozixu.weebly.com/uploads/1/3/1/1/131163876/wutozidetaj_dilib.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/kavako_giwipavaril.pdfIn PDF document text
    • https://wuxipatinux.weebly.com/uploads/1/3/4/6/134662372/netizarafuviga.pdfIn PDF document text
    • https://puzileto.weebly.com/uploads/1/3/4/6/134674509/kamiximeziligu_vujiz_ganil_ganujaredus.pdfIn PDF document text
    • https://giruveme.weebly.com/uploads/1/3/4/4/134480937/vuxabupikezesak.pdfIn PDF document text
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/soxosolamazen-zivuperaduniku-nomogepa-zuxaxu.pdfIn PDF document text
    • https://alummaswaja.com/yii/sdbalikpapan/home/images/upload/files/25599223222.pdfIn PDF document text
    • https://mezamelakinates.weebly.com/uploads/1/3/5/3/135304028/zexavizutunapuw.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/nanonuwazotowupogaxalad.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2022021515550727.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000bbd8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000bbd8.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD8 17184 bytes
SHA-256: e8a0573432a2f2fa58bba3db3a8a0b0580b6d55c8438356a3b697f10fd155dac
font_01_sfnt_off0000e8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E8 10772 bytes
SHA-256: 325e59782771071c2e9700a35be2b2e94b57a248b62390d642c8ca17f5571942